Microsoft scolded the United States and other countries on Sunday for “stockpiling” software “vulnerabilities” that can cripple computers around the world after a massive ransomware attack, tied to a leaked trove of NSA spy tools, hit at least 150 countries beginning on Friday.

“The governments of the world should treat this attack as a wake-up call,” said Brad Smith, Microsoft’s president and chief legal officer, in a blog post Sunday.